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    <title>第一题</title>
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<pre>
from time import sleep

class Person:
 def __init__(self, name, age):
  self.name = name
  self.age = age
 def speak(self):
  print("我是%s, 今年%s岁了。" % (self.name, self.age))

class Student(Person):
 def __init__(self, name, age, school, id):
  super(Student, self).__init__(name, age)
  self.school = school
  self.my_id = id
 def speak(self):
  print("我是%s, 今年%s岁了, 我来⾃%s, 学号是%d。"% (self.name, self.age, self.school, self.my_id))
 def run(self, v, times):
  return v*times

class CollegeStudent(Student):
 def __init__(self, name, age, school, id, language):
  super(CollegeStudent, self).__init__(name, age, school, id)
  self.language = language
 def speak(self):
  print("我是%s, 今年%s岁了, 我来⾃%s, 学号是%d，我会%s。"% (self.name, self.age, self.school, self.my_id, self.language))
 def coding(self):
  print("I am coding", end=" ")
  for i in range(10):
   print(".", end="")
   sleep(1)

x = CollegeStudent('小明', 22, 'china', 12138, 'English')
x.speak()
x.coding()
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